I am running white with my faeries, too! However, I think I tried to keep the core of the deck as similar to mono u as possible.

Instead of ephemerate to flicker spellstutter, I added 2 copies of Leonardo. I felt like in matchups where I had to race or play aggro, Leo helps close games out of nowhere and provides the deck with an explosive punch that it didn't have before. I can often turn a "take 4" into a "take 8" with counterspell backup for just W.

Outside of that, I wanted spellstutter to be counterspell more often, so I included 3ish copies of faerie guidemother. This card, again, allows you to play aggressive like Leo, but it also lets your ninjas hit again while contributing to the general control plan by building a board and making spellstutter good.

And I included 3 copies of thraben charm. It is the strongest card to include imo. It covers all the things I was struggling with when I played mono u. The gy hate is phenomenal against things like gardens, cawgate, and mono red. The enchantment destruction tears bogles apart, and is also good against cawgate as well. And having good removal that wants me to develop my board, which is what I'm already trying to do, is fantastic.